Husqvarna 240 stalls on throttle

Frequent malfunctions of the Husqvarna 236-240 chain saw

If it is not possible to start the motor, the following steps must be taken in sequence:

Locating the air filter and spark plug.

• Check the gasoline tank.
• Change the fuel if it has been stored for more than a month.
• Check the fuel filter. Disconnect the hose from the carburetor and observe the trickle. If gasoline is flowing freely, the fuel filter is not clogged. If not enough flow, clean the hole in the tank lid or the filter.
• Clean the air filter. The air filter may be removed for check startup.
• Inspect and clean the muffler for carbon buildup.
• Check that the starter is working properly. If necessary, repair the starter (replace the pulley, spring or cable).
• Disassemble and clean a clogged carburetor.
• Use a tester to test the high-voltage wire for open circuit.
• Measure the gap between the flywheel magnets and the ignition module (should be 0.2 mm).
• Unscrew the spark plug and inspect it. Measure the gap between the electrodes with a feeler gauge (normally 0.5-0.6 mm). The appearance of the electrodes to determine the nature of the fault. If the spark plug is dry, there is no mixture. The working part, flooded with gasoline, indicates a poor adjustment of the carburetor or the lack of spark. To check for spark, connect high voltage plug to the spark plug, place the skirt on the cylinder radiator and pull starter cord. If there is no discharge between the electrodes you need to replace the spark plug. Carbon deposits on the electrodes indicate poor fuel mixture. The center and side electrodes should be ground with sandpaper.
• No compression. The reason is the failure of the piston group. Measure the compression. First unscrew the spark plug. Then insert the pressure gauge into the cylinder bore and use the starter cord to move the piston. The condition of the cylinder-piston group (CPG) is judged by the pressure in the cylinder. It should be at least 8 atm. Low readings are caused by wear of the cylinder, piston, piston rings.

Why the chain saw stalls

If the chainsaw starts and stops, there may be various reasons. Check the muffler and fuel filter before trying to repair the machine.

If the cut-off saw stalls, it is important to check that there is still a mix of oil and gasoline in the tank. If the fuel mixture has run out, the unit will not run. If there is still gasoline left in the tank, it is important to check that the machine is still working properly before it is turned off. If you hear unusual noises and then stop suddenly, be alert.

Carbon deposits on the electrodes can also make the tool difficult to operate. You should carefully inspect the device, clean it if necessary.

When the throttle is depressed

If the chainsaw stops when you accelerate, check the muffler and fuel filter. A possible cause of the malfunction is a leak in the fuel hoses. In some cases, adding revolutions helps.

Sometimes the check of all parts does not work, the tool is suffocated, gas is added. If the device stalls when a person presses the gas, it is possible that the fuel supply is not enough for normal operation. This phenomenon is caused by a clogged carburetor or filter.

The air filter can also malfunction if dust clogs the air filter. When you start the gas, the machine stops working. It is not worth troubleshooting on your own, because each model has individual characteristics.

Insufficient or no lubrication in the chain saw chain can cause a problem. If the chain is dry, you should clean the ducts through which the oil flows to the busbar of the appliance. If the oil is leaking, there are cracks, defects on the tubes, you need to treat them with sealant.

Under load

In situations where the unit stalls on load, the problem may be with the gas tank or filters. Check the fuel quality and change the filter.

Often the saw does not pick up speed because the fuel in the gas tank has a low octane rating. Not enough power, not enough warmup, chainsaw quits under load.

Often faults in the components lead to the fact that the device under load stalls. Check hoses, seals and gaskets for leaks. If there are faulty parts, you may try to repair or replace them.

In cases where the chainsaw starts and immediately shuts down, there is not enough fuel, the unit does not heat up. The device should be refueled

It is important to use the proper mixture. Different models are better suited to different types of fuel. It is necessary to read the instructions, recommendations, testimonials from people who have had the appliance operate normally

It is necessary to read the manual, recommendations, reviews of people who have the device works properly.

At idle speed

In situations where the chainsaw stalls at idle speed, it is necessary to inspect the condition of the muffler. If the part is dirty, the exhaust gases are poorly drained, the engine cannot continue to run, it stops.

The saw shuts off when idling and when the carburetor is not properly adjusted. For beginners, it is better to have the repair done by an expert, since there is a chance of improper adjustment that will cause the tool not to work. A tachometer is needed to adjust the carburetor.

At high RPM

If the device stalls at high revs, pay attention to the condition of the gasoline and air filters, the serviceability of the fuel hoses

A dirty air filter can be washed under warm running water

It is important to dry the part thoroughly before installing it so that water does not impair the tool’s serviceability

If fluid stops flowing through the fuel hose, it is clogged. The part can be cleaned or replaced with a new one.

In those cases where the saw cuts out at high RPMs, but the fluid is flowing fully through the hose, and the air filter is clean and serviceable, look for the cause of the breakdown in the fuel filter. Replace it with a new one or clean it.

In some cases the problem is in the gasoline pump. As a component wears out, fuel begins to leak through the walls. If this phenomenon is noted, a new pump should be installed.

If it tilts

If the saw does not revolve when tilted, shuts down, stops working, it is necessary to check the fuel level in the tank. If it is not too high, the inclined unit is not getting enough fuel because the fuel pipe is above the blend.

Tools and materials

The design of chainsaws mechanical components is characterized by good reliability and maintainability. Virtually all components and parts are accessible to the public. If you have the right tools, they are simply removed for repair or replacement. To conduct disassembly and check the life-support systems of the chainsaw motor, you should have the following tools and materials:

• A set of locksmith’s tools;
• Socket wrench;
• Tester;
• Pressure gauge to measure compression;
• Gap gauges;
• Needle;
• Sandpaper;
• Fuel mixture (gasoline oil);
• Rags.

READ Wood Circular Saw Blade 200

Checking key chainsaw systems

If the chainsaw refuses to work properly, you must make sure that all the conditions required for its normal operation are met:

Then it is necessary to check the function of all its elements one by one. First the fuel tank should be checked. If the cause is not the volume or quality of the fuel, the likely cause of the malfunction may be the spark plugs. The spark plug gap should not exceed 0.5 mm. If it is too small, it means the spark plugs have a lot of fouling on them. In such a case, you should remove the plugs, clean them, then install them in place and try to start the chainsaw. In addition, it is advisable from time to time to completely replace the plugs with new ones, even if they are in good condition.

Then you need to check the condition of the fuel filter and carburetor. Self-cleaning the fuel filter is an uncomplicated task, but the repair of the carburetor is best entrusted to specialists.

Why does the gasoline saw go out when I push the gas: causes and solutions

It’s not uncommon for chainsaw owners to have to deal with their breakdowns, and it doesn’t matter what model of this type of equipment, since the nature of the failures is almost the same for all. Well, it’s a chainsaw stalled and what’s next? Undoubtedly, you can include the equipment in specialized services, which will repair your “iron friend” for a fee. But, as they say: why pay more?

You may end up personally disassembling the tool and repairing it, as the breakdown may be minor, and it will cost you a lot to do so. But of course, in order to bring the tool back to life, you must be able to understand the reasons for its failure and how to fix it. So let’s learn! In this article, you can find answers to questions about situations where the tool just throws after a direct throttle touch. So, let’s get started.

Chainsaw does not hold idle speed

The problem is quite common. The most common causes that produce stalling when starting and cranking the chain:

• Air filter and fuel filter are clogged;
• Low-quality fuel is used or the fuel mixture is incorrectly prepared;
• Problems with the ignition module;
• The carburetor’s settings don’t match the load level;
• Deformation or rusting of the motor units.
• The fuel hose is thoroughly flushed or replaced;
• The air filter is cleaned of all contaminants. The reusability of the filters allows them to be removed and cleaned with detergents;
• Fuel and oil are checked for quality. It is best to use the mixtures specified by the manufacturer in the manual;
• The carburetor block and spark plugs are tested.

There is often only one part problem. After its elimination, the unit can be actively operated again.

OUR CHAINSAW REPAIR SPECIALISTS:

Also in our service center you can sharpen the old chain or buy a new one.

You can also get a quote for a Husqvarna chainsaw repair by phone. Describe your fault in detail to our specialists. Please note that accurate and complete information on the nature of the fault can only be obtained in an authorized service center. We are waiting for you in our workshop in St. Petersburg!

Your chainsaw will not start. Why? Causes and avoidance.

Home ” Chainsaws ” Miscellaneous ” Chainsaw won’t start. Why? The Reasons and How to Avoid It.

Your chainsaw will not start? This can often happen at the most inopportune time when you need to work urgently. You will agree that this is unpleasant. We must admit that chainsaws from reputable manufacturers (STIHL, Husqvarna, Echo, Solo, and others) do not start much less often than those from Chinese manufacturers. Today let’s discuss the causes of this unpleasant event and how to avoid it. If you do not find your cause among those listed, you can in the discussions.

We start with the fact that it is necessary to determine whether you have a new chain saw does not start or it has been in use for a long time. This is necessary in order to choose corrective measures.

If you do not start your new chainsaw, then:

• In case 14 days have not passed since the purchase, you can return or exchange the purchased chainsaw. This is the most sensible way out of all. (When buying a chainsaw, be sure to ask the salesman to start it. This does not apply to online stores, because serious IM always check the product before sending it to the buyer.)
• In case it is not possible to exchange the chainsaw for objective reasons or if more than two weeks have passed since the purchase, the reasons are probably quite serious. To be sure you are stopping your chain saw for technical reasons and not due to oversight, read the owner’s manual very carefully.
• Here are some of the reasons why your chain saw won’t start, and why they are particular to both a new and a used chainsaw.

Here are the reasons a chainsaw won’t start in the sequence you need to check.

• Check the fuel in the tank and its quality. It’s only logical that a chainsaw won’t start without fuel. So if you don’t have any fuel, start it up. If fuel is left in the tank for an extended period of time (more than 3 weeks), drain it and put in new fuel. If the fuel is stored unsealed and oxygen is available, it quickly loses its octane rating and becomes unsuitable for use by the chainsaw. Read more about fuel here: How to dilute gasoline for a chainsaw? Choosing the right oil, mix ratio
• Check your chainsaw’s spark plug. first, whether it is primed or not. If it is wet, wipe it off, blow it out and put it back. Secondly, check for sparks. It can be checked by unscrewing it and putting the tip on the cylinder block and pulling the starter cord. If there is a spark, then proceed with the reasons. Third, look at the spark plugs. For more tips on how to diagnose a chainsaw with a spark plug, see here: Checking Your Chainsaw’s Engine with a Plug Condition.
• Check the air and fuel filter. Severely clogged filters can keep a chain saw from starting. The air filter is right under the top cover on the chain saw. The fuel filter is in the tank. Also check the breather plug, which is also located in the gas tank. For diagnostic purposes it is better to remove them and try to run it without them.
• Check the muffler for carbon buildup. Read more about muffler cleaning here: Cleaning Your Chainsaw Muffler.
• Inspect all hoses and connections. A loose connection or cracked hose is often the cause of a chain saw that won’t start. It is also necessary to inspect the crankshaft oil seals.
• Clean the carburetor. It is best to disassemble the carburetor of a chainsaw on a free table, spreading a clean cloth. Lay out all the spare parts separately to ease reassembly. You would need to clean the carburetor with special products for cleaning injectors and flushing injectors, for example.
• Check the ignition system. Corner might be off, flywheel might turn.
• If the previous measures did not help and the chainsaw still does not work, the carburetor may need adjustment. Adjusting the carburetor on any chainsaw is similar to the above link. The only exception is STIHL chain saws, which have only one idle speed adjustment screw.
• The most unpleasant situation is when none of the above measures helped. Here you may need to replace the CPG (cylinder-piston group). There are three ways to check this: 1.If the piston does not move in the cylinder, it is definitely better to replace the cylinder head. Of course, you can put a new piston and bore the cylinder, but it will not give the same result as in the case of a new cylinder head. 2.Disassemble the chainsaw and do a visual inspection. 3.Remove the muffler and look at the visible part.

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Main malfunctions

If you have ever wondered how a carburetor works, you can’t help but notice that all the holes in the carburetor assemblies are extremely small. Even a little contamination from bad fuel can cause improper fuel or air circulation. Yes, there are filters on the intake and exhaust ports, but they don’t always do their job. Where does this lead to?? Any mechanic will tell you the consequences.

Major chainsaw malfunctions due to the carburetor:

• Gasoline consumption has increased, thick black smoke comes out of the exhaust pipe, there is a lot of soot and smoke all around;
• The motor starts, but sneezes and shoots into the carburetor;
• The engine has lost power, the chainsaw no longer “drags”;
• You were unable to start your chainsaw;
• It is impossible to achieve normal operation of the engine: RPMs are floating all the time;
• Chainsaw stalls immediately after starting or when you sharply press the gas pedal;

As we can see, trouble from a faulty carburetor is guaranteed. over, without disassembling the unit and its subsequent adjustment, they can hardly be eliminated. So it makes sense to take a closer look at the carburetor.

Why the chain saw won’t start. causes and solutions

Every model has its weak points. Some saws need regular carburetor adjustments. Others have a defect in the chain lubrication system. Be that as it may, any breakdown can be eliminated with your own hands, if you understand what its cause is, and what its signs are.

What to do if the chainsaw stalls when you press the gas?

As a rule, owners of chain saws begin to encounter this malfunction after the first 6 months of intensive use of the tool. There are several possible causes for this problem.

• Using a fuel mixture that has been mixed in the wrong proportions. If you regularly fill up the gasoline tank of a chainsaw with too much or too little oil, the tool will not start. In this case, it will be necessary to drain the fuel and also to dry the engine cylinder. To do this, you need to pull the starter rope sharply several times. After that, you need to pour in properly prepared fuel, and start the saw’s engine;
• pouring oil on the spark plug when starting the engine. The problem can be solved by removing, cleaning and drying the spark plug. After 30 minutes the spark plug is dry and can be screwed in. After that, it will be necessary to start the chainsaw;
• no spark. This indicates poor contact between the factory high voltage wire and the spark plug lug. If the contact is intact, but there is still no spark, then it is necessary to check the electronic block of the chainsaw’s ignition system. This element is not repairable, so it will need to be completely replaced;
• clogged air filter. This part of the saw needs to be regularly cleaned of debris, small insects, and dust. Otherwise air will not get into the carburetor, where it should enrich the fuel mixture. It could be a clog in the air filter and cause the chain saw to stop starting. To solve the problem, you will need to clean the filter, or replace it.

Problems “On the Hot

If you notice that the chainsaw has no problem starting without warming up, and after warming up it stops. And it will not start until it cools down, then there may be several problems.

First, there may be a hose, packing or gasket leak somewhere. Second, inspect the muffler for fouling. The third reason is in the cylinder piston group (CPG), there are no scrapes or irregularities there.

Sometimes you need to adjust the carburetor. Another important cause of malfunction is the ignition coil. In cases when it fails, the spark is lost or becomes very weak, which is not enough to ignite the fuel mixture.

There are known cases when the master tries the engine hard, then on cold, then on hot, thereby pumping fuel. Here you need to get a grip, put the choke on “hot start” and gradually start the tool. In this case we knock down the revolutions to almost idle and for 40-45 seconds it warms up.

Causes that cause the chainsaw to stall under load

This article of the construction site will discuss the main reasons why a chainsaw may not start or shut down when loaded.

The most common of all, are the following causes:

What causes the chainsaw’s power to drop?

The same applies to the air filter, it must be cleaned immediately if this kind of problem occurs. Now about the spark plug, it, if very dirty, is also subject to cleaning and adjustment if necessary. It is the wrong gap between the electrode of the spark plug on the chainsaw can lead to the fact that it will start to stall, and in general, work extremely unstable.

Why the chainsaw malfunctions when heated

It’s not uncommon for a chainsaw to start when cold, but shut down as it heats up. This behavior of the tool may be caused by the following:

• The carburetor is not properly adjusted. You can identify this problem by the way the device is started when cold. If it is made without closing the air damper, and the engine is started without a preliminary flash, it means that after heating the engine, the fuel floods the spark plug. The solution to this problem is to adjust the carburetor. on carburetor adjustment
• Coil (ignition module) malfunction. You can isolate the problem by gradually testing the spark plug on a cold engine first, and then on a hot one. If there is no spark on a hot engine, it is necessary to perform replacement of the ignition coil.
• Spark plug malfunction. In this situation, as with the ignition module malfunction, the spark disappears when the motor heats up. Replace the spark plug with a new one and if this does not solve the problem, check the ignition module and the distance between it and the flywheel.

Useful hints from Kosi-Kosa specialists

If you already understand the reason why your saw cuts out at idle, but don’t know how to disassemble or remove a single part, say, the carburetor. watch the videos from our other articles from our experts, read the step-by-step instructions in the articles. It is also recommended to be especially careful with all movable elements to avoid traumatism. Other important recommendations include:

• Always drain the gasoline before starting disassembly, even of external elements;
• cover the hole in the engine with a rag so it doesn’t get clogged;
• disassemble the carburetor on a dry clean surface, and the number of revolutions of other screws to write down beforehand, so as not to knock down all the settings;
• reassemble everything in exactly the same order as disassembled, even putting the bolts in their “native” place.

Your saw will no longer stall at idle if you carry out the procedure competently. What to do when the gasoline tool stalls in other situations. the KosiKosa gasoline tool store is sure to tell in our articles.

Why the chainsaw won’t start and shuts down?

If your chain saw won’t start or shuts down when you press the gas, it is probably caused by a leaking carburetor or crankcase. This malfunction is eliminated by checking for leaks and adjusting the carburetor.

Besides, this problem can be caused by a defect in the fuel tank breather. Because of the vacuum in the fuel tank during the operation of the chainsaw the required volume of the fuel mixture does not arrive in the engine, and therefore it can not pick up speed or stops. If you stop the saw, open and close the fuel tank and turn it on again, it will run normally for about five minutes and then stop revving or stall again.

Another possible reason for a chainsaw not being able to pick up speed could be excessive fouling in the muffler, making it difficult for the exhaust gases to escape, which reduces the power and rpm of the motor.

and how much it costs

The Partner 350 or 350S chainsaw is popular, the price is about 7000, and the reliability and durability are better than cheaper competitors.

The Partner P350 Chrome extended the life of the engine, because its chrome-plated barrel surface is one of the features of this model.

I bought my Partner after several years of using an inexpensive Chinese saw. Yes, the price is much higher, but with active use, the cost of consumables (oil and gasoline) should cover everything, because the fuel consumption is much lower.

I bought it on my friends’ advice and I don’t regret it. After 3 years of use, the guide bar has been replaced, and that is entirely my fault. Never had any other problems. Easy to start, enough power for domestic use.

Malfunctions can occur with expensive German or American-made chainsaws, as well as with cheap Chinese knockoffs. It is a good feeling when starting a power tool up: the saw warms up and gradually attains rated power as specified by the manufacturer and runs throughout the length of the working cycle. The situation is worse if the opposite happens: after pulling the throttle cable, the machine slows down, runs jerkily after a short pause, stops, and restarts with a push.

The causes of this phenomenon may be many, as well as a variety of scenarios. Let’s consider in detail, each working situation and the failures that preceded them.

If the chain is not lubricated

Chain lubrication is important to reduce friction in the guide bar grooves. There is an oil screw to adjust the lubrication system. The chain is only lubricated while it is in motion. Check the oil pump by pointing the tire toe toward the light surface. When the throttle handle is pressed, oil splashes should appear on the surface.